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4 Sheets-Sheet 1.

. J S T EVE R. Polishing-Machine. N 0. 222,325. Pate nted Dec. 2, 1879 WITNESSES & NVENTOR ATTORNEY N. PETERS. PHQTO-LITHOGRAPNER. WASHINGTON. D c.

4 Sheets-Sheet 2.

J STEVER. Polishing-Machine. No. 222,325. Patented Dec. 2,1879.

nwrmum WITNESSES INVENTOR ATTORNEY "-FETERS. PNOTO-LITHOGRAPHER, WASHINGTON n c 4 SheetsSheet 3.

9 7 8 a e D d ne lt n Roe E a m VM E. n i h JS H O INVENTUR ATTORNEY.

WITNESSES N-FETERS, PHOTO-L THOGRAPH 4 shgets sheet 4. J. STEVER.

Polishing-Machine. No. 222,325. Patented Dec. 2,1879.

IIIIIIIIIIII' ATTORNEY FEIERS. PHOTO-LITHOGRAPHEK WASHINGTON. n C

hHAMQASSIGNOR OF oN ALuoE I RIGHT u FAcT Rme QOMPANY OF h V motion gthiof the stroke of the ubbing pad or block maybe readily changed whil the machinef is in Q motion; and, turthe'r, toa

low the object or. article-being polished to be moved either "longit idinally or,

A represents the lower portion of the frame of the machine which is supported upon legs i or standards as, Upon one end of frame A is =1 pp a when fla by hecq posts I).

is provided with a tongue,= sides f thereby affording a for the slideblock Gr, which is fitte H are. stops secu edatjopposi thebaror frame F, to limit fthesliding blockG,

treadle K.

the stroke. Instead of the di {a crank with holes formed ther riable adjustment of the Wris 3 Eis a couutershaft supp andarranged parallel with in H oneend of the counter-shaftE srig lly keyed e; 'F, which h iindercut dmgib ar n or otherwise secured a bar o mov A H represents a connectin which is journaled upon til: tached to the face of disk {site end is attached to a pin rear side of the bar or fram distance from its center ofnioy the bar or frame F has an oscill ment imparted thereto when 1th -the'main driving-shaft is rotated, H necting-rod, having one of its end v y "s held stationary w "Ie the oscillating bar or frame is in m'otionnf Fig.4 is-asimilar (18-? ,tached viewyshowingthe parts adjustedwto impart the maximum length of stroke tothe' rubbing-pad or polishing-block, Fig. 5 is a plan v iew of the framefor supporting the latjerally-adjustable bed, the latterybeing rcmoved to show the mechanism for imparting a reciprocating movement to its frame; i

the rear end of a sliding bar orr may be pivoted to a cross headyto sliding bar is attached, audits opposite end attached to a pin secured tothefslid block G.

Tothe connecting-rod I is pivotedfthe upper end of an adjusting-rodyK, thelower end of which is pivoted to the longiarm of the Slide-bar J is of angular form in' cross-section, and reciprocates Within suitable guides j j, and to its outer end is removably secured the holder L, which latter is p 'ded With a socket, l, which fits upon the forward;end of the slide-bar, and is secured thereto by a setscrew, 1, or by an equivalent fastening device. Holder L consists of a vertical tube, L, within which is received the cylinder L the latter having a block, L, formed solid therewith; or it may be made separate and attached thereto. A spring is interposed between the upper end of cylinder L and upper end of the tube L, and serves to allow of the yielding movement of the polishing-block. The block is retained within the tube by means of a pin, l, secured to the cylinder and working in an elongated vertical slot, 1, formed in the tube.

M is a vertically-adjustable frame, having guide-rods M secured to its ends, said guiderods extending downward through the lower portion, A, of the frame of the machine. The lower end of guide'rods M rest upon the ends of the arms on of the bififlcated levers N, which latter are pivoted to brackets or lugs N, and their inner ends connected by the links N? with the foot-treadles 0. By depressing the treadle the inner ends of bifurcated levers will be depressed and their outer ends raised, thereby operating to raise the opposite ends of the frame M simultaneously, the object being to retain the frame M in a horizontal position throughout its varied vertical adjustments.

Frame M is furnished with the rollers P P P, thejournals of which are supported in the sides of the frame.

Q is a metal band, rope, wire, or chain, fastened to the central roller, 1, and one end passing around roller P, and from thence extending to the end q of the longitudinallyadjustable frame It, to which it is secured, while the other end passes around the roller P and is secured to the end q of frame R.

The sides of the frame M are provided with tongues or trackways i", which enter corresponding grooves in the sides of frame R. Anti-friction rollers may be placed between said frames, if desired. Upon the ends of frame It are secured the transverse ways S, which fit in groove S, formed in the ends of the laterally-adjustable table T. Thusit will be observed that the table T may be readily moved either at right angles to or in line with the line of movement of the rubbing-pad or polishing-block, as may be desired.

Having described the construction and relative arrangement of the several parts of my improved machine, I will now proceed to describe its operation.

The article to be polished is secured by clamps, or in any desired manner, to the table '1. Motion is imparted to the main drivingshaft, and through the disk, connecting-rod, and counter-shaft an oscillating movement is imparted to the bar or frame F. The sliding block, adjustably connected with the bar F, is lowered to rest upon the lower stop, and in such position the pin on the sliding block, and lo which the connecting-rod is secured, will be in line with the center of the counter-shaft, and hence, in this position, no motion will be given the rubbiugpad or zblock. Everything being in readiness, the treadle K is depressed by the foot of the operator, which serves to move the sliding block toward the outer end of the oscillating bar or frame F, and thus imparts a reciprocating movement to the rubbing-pad. Crank U, attached to the shaft U, connected with the middle roller, 1, of the verticallyadjustable frameM, is then turned to adjust the frame to present the article to". i be operated upon in desired horizontal posi tion, and the desiredlateral adjustment is j given the table T, upon-which the article is secured. The treadle' Ojis then depressed, and the work is raised'fand subjected to the action of the polishing blockior pad.

The degree of pressure oiif the treadle 0 may be varied according to the" character of work to be produced.

It is often the case that different strokes of} the polishing-block are required to secure a uniform and even-polishedsurface, and itis desirable that such operation may be effected without rendering itnecessary to stop the ma,

chine.

By my improved machine long or short strokes of the polishing padior block may be secured at will by simply'v f'arying the pressure ii on the treadle K, andhence the machine is rendered specially adapted for polishing sewing-machine tablets and other kinds of woodwork, though it is evident that it may also be used for polishing glass, stone, and metals.

The polishing block or pad may be constructed to have a combined lateral and vertical yielding movement.

Again, difl'erent forms of construction and arrangement of parts may be substituted for that shown and described for varying the adjustment of the sliding block, to which one end of the connecting-rod is attached.

A rack-bar may be attached to the face of l the oscillating frame or bar, and by means of a pinion and hand-lever the rack-bar could be raised and lowered. By'pivotiug the end of ,7 l i the connecting-rod to therack-bar the desired result could be eflectethand variable strokes imparted to the rubbing'pad or block.

I am aware that a shaping machine has been constructed with an adjustable crank device, a pitman pivoted thereto, and a slide provided with its cutting-tool, the parts being arranged and adapted for varying the stroke of the cuttin g-tool; but in such construction the adj ustment of the crank device is in line with the stroke of the cutter, and the adjustment is effected by means of screws and bevel-gearing.

The adjusting screw in such case not only serves to adjust the crank device, but serves to receive the entire resistance exerted on the cuttin g-tool. While such construction of parts may be adapted for shaping-machines it is not adapted for polishing-machines, where it is essential that the stroke of the rubber may be readily and quickly varied at will, and at slight expenditure of power, and hence I would have it understoed th make no claim to adjusti ing mechanism of the; eharacter used in: shap j nag-machinesasab veset-fforth. In my improved;'p lisliing-maehinethe adjnstable slide-block isfcqnnected with an 0scillating'arm', ahdj thehle jadaptedffiobe ad- 1 justed practicallyatr ght ngles tq'thestro'kel of the rubber, Wl erebyf ejresis'tance enc'oun -tered'by the'rubber in Workisftransmitted th q llatiug ha t' 6 1 thereby; "the p we ire u r o 'rg' i1 'ahead; 1 justment ofthe slide is simplygsuch' 11 i 0 1 tithe weightef thejfl (119i;then connecting rod; 1 Nail? H any imp fj em i v lve gearing ortei any? construction 0 comb n'atieuofparts heretm f em l y m li's-g ringias y p v fIt isrevident; th n sl ght changesiim the censt'ruetien land rrangement of parts *mightbftesdrted'fto' fw th dut departing {from the spirit [of my invention; and hen ce. 1;. would; have 1it understood that I no i not limit myself parts ShOWn and described; but, f I a l l' tfiaving u y sc b d m invention, what Eters Patenmis i a a 1 In anpelishing-inachine; the cbmbinatibn "dversaidbed or table, of a slidingi -connectedat one end to *thegjrubb p0lishing-bl0ck,a connecting-red 6nd d ectl in c y me" slidingbargand' its opposite en 1 mungar, anadjustiug-rod pifvb "to; said connecting-rodgand at its;

t6 the exactvcenstructien" and arrangement of i new, and desire to scurebyLeta v Witnesses: with an adjustable suppbrting bed or table, 5 1

anda rubbing pad or 'pqlishing block Incated bed or table and ing baror rod, of a eonnecting-rodhaving one end directly or indirectly connected with said V sliding bar and its opposite end pi 'tedft -a a sliding block attached to an 0seillaiding; ar',-f

and means for adjusting said slidingbl ward or from the center of m 0tion;:0fthef0si 'cillatin g bar and practically at rig h angls ti the stroke of the rubbing-pad 0 r hleck isubstantially as set forth Infa pclishing-machinq th "Wit an adjustable bed or table a [ble rubbing-pad or polishing-Q sliding l bloel; adj ustably secure to atreadle for raisin gand lower .iugblock and thereby varyingth treliefef the rubber atawill, while the mac tieu', substantially"as set forth?" a with 'af'fram e having guide-rods secured tq its ends, of bifurcated levers and'i a ,tradley-for imparting simultaneous vertical mevementlto the opposite ends of said frame; substantially asset forth. 7 a

In testimony that I claim thel f eg oing l have hereunto set my hand thisls 110706131879. I

S. M. GARDNER, it: H.-D. MORSE.

owe

JEREM AHPJs 

